<?php

class WStringValidator extends CValidator
{
    public $charset;
    /**
     * @var integer maximum length. Defaults to null, meaning no maximum limit.
     */
    public $max;
    /**
     * @var integer minimum length. Defaults to null, meaning no minimum limit.
     */
    public $min;
    /**
     * @var integer exact length. Defaults to null, meaning no exact length limit.
     */
    public $is;
    /**
     * @var string user-defined error message used when the value is too long.
     */
    public $tooShort;
    /**
     * @var string user-defined error message used when the value is too short.
     */
    public $tooLong;
    /**
     * @var boolean whether the attribute value can be null or empty. Defaults to true,
     * meaning that if the attribute is empty, it is considered valid.
     */
    public $allowEmpty=true;

    /**
     * Validates the attribute of the object.
     * If there is any error, the error message is added to the object.
     * @param CModel the object being validated
     * @param string the attribute being validated
     */
    protected function validateAttribute($object,$attribute)
    {
        if(!isset($this->charset)) {
            $this->charset=Yii::app()->charset;
        }
    
        $value=$object->$attribute;
        if($this->allowEmpty && ($value===null || $value===''))
            return;
        $length=mb_strlen($value, $this->charset);

        if($this->min!==null && $length<$this->min)
        {
            $message=$this->tooShort!==null?$this->tooShort:Yii::t('yii','{attribute} is too short (minimum is {min} characters).');
            $this->addError($object,$attribute,$message,array('{min}'=>$this->min));
        }
        if($this->max!==null && $length>$this->max)
        {
            $message=$this->tooLong!==null?$this->tooLong:Yii::t('yii','{attribute} is too long (maximum is {max} characters).');
            $this->addError($object,$attribute,$message,array('{max}'=>$this->max));
        }
        if($this->is!==null && $length!==$this->is)
        {
            $message=$this->message!==null?$this->message:Yii::t('yii','{attribute} is of the wrong length (should be {length} characters).');
            $this->addError($object,$attribute,$message,array('{length}'=>$this->is));
        }
    }
}

